Mak LY, Yip PS and Yuen MF
A 87-year-old gentleman with end stage renal failure on peritoneal dialysis presented to the emergency department for sudden onset shortness of breath. A chest x-ray was obtained, revealing apart from a left sided pneumothorax, there was alarmingly a gas density under the right hemidiaphragm. It is diagnosed as Chilaiditi's sign in a peritoneal dialysis patient.